Technical data

3-18 Computer Group Literature Center Web Site
Test Descriptions
3
Time out waiting for Interrupt
An expected interrupt, either
from Initialization, Transmit
or Receive was never
received, indicating some
other problem has occurred.
Memory Error interrupt encountered (MERR)
Interrupt that occurs when
the controller cannot access
the memory bus.
Time Out interrupt encountered (BABL)
Interrupt indicating that
transmitter has taken too
long to transmit a frame.
Collision Error interrupt encountered (CERR)
Interrupt indicating that the
AUI port collision inputs
failed to activate in a timely
manner after a frame was
transmitted.
Missed Frame interrupt encountered (MISS)
Interrupt indicating that the
receiver missed an incoming
frame because there was no
place to put it (no buffers
owned by controller).
Jabber Error interrupt encountered (JAB)
Interrupt indicating that the
twisted pair transmission
limit has been exceeded.
Collision Counter Overflow interrupt encountered
(RCVCCO)
Too many collisions have
occurred.
Table 3-4. DEC Error Messages (Continued)
Error Message Symptom or Cause